White-Rodgers 21D28-6 Evaporative Cooling Thermostat and Control Box

- Item #: BCI2138346

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Evaporative Cooling Thermostat and Control Box

The 21D28-6 acts as a switching device for the thermostat to provide an even level of cooling with a choice of high and low speed control of the fan on evaporative coolers.


  • Temperature Range Scale: 1-2-3-4-5 (55°F to 95°F)
  • System Switch Positions: Off - Cool - Vent
  • Fan Switch Positions: Hi - Lo
  • Integral transformer for 120 VAC or 240 VAC to 24 VAC
  • Relay panel removable for field wiring
  • Separate fan and pump relays
  • Lightweight, weather-resistant plastic case meets all code requirements


  • Secondary Voltage: 24 VAC
  • Combined Relay Loads (Full Load)
  • 16.0 A @ 120 VAC
  • 8.0 A @ 240 VAC
  • Combined Relay Loads (Locked Rotor)
  • 48.0 A @ 240 VAC
  • 96.0 A @ 120 VAC
  • Fan Relay (Full Load)
  • 12.0 A @ 120 VAC
  • 6.0 A @ 240 VAC
  • Fan Relay (Locked Rotor)
  • 36.0 A @ 240 VAC
  • 72.0 A @ 120 VAC
  • Pump Relay (Full Load)
  • 10.0 A @ 120 VAC
  • 5.0 A @ 240 VAC
  • Pump Relay (Locked Rotor)
  • 60.0 A @ 120 VAC
  • 30.0 A @ 240 VAC

White-Rodgers, a recognized leader in climate control solutions, celebrates 75 years of business in 2012. Experience, integrity and customer service are still the tenets that mark this great company. From the humble beginnings of two engineers collaborating to solve the control problem of the day, to being the answer for your climate control needs, White-Rodgers is the respected name among industry professionals and home owners alike.

Additional White-Rodgers Links

Our SKU: White-Rodgers 21D28-6

This product is listed under the following manufacturer number(s):

  • White-Rodgers W21D286

*Denotes a finish or option that has been discontinued

White-Rodgers 21D28-6 Product Specifications

Installation Sheet
Wiring Guide
Specification Sheet
Power Type Direct Wired
Voltage 120, 240

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

White-Rodgers 21D28-6 Reviews

Rated 5 out of 5 by from worked perfactly exact replacement so it fit and worked perfectly .
Date published: 2014-07-26

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